Multiple-spindle drilling-machine.



No. 842,175. PATENTED JAN. 29, 1907.

' E. W. CLEVELAND.

MULTIPLE SPINDLE DRILLING MACHINE.

APPLICATION FILED MAR. 27, 1906.

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PATENTED JAN. 29, 1907 E. W. CLEVELANDI MULTIPLE SPINDLE DRILLING MACHINE. APPLICATION FILED MAR. 27, 1906.

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A wine UNITED vsrarns' PATENT ()FFIOE.

EDGAR W. CLEVELAND, OF SPRINSFTELD,

MASSACHUSETTS.

MULTIPLE-SPINDLE DRILLING-MACHINE.

Specification of Letters Patent.

Patented Jan. 29, 1907.

Application filed March 27, 1906. Serial No. 308,227.

To all whmn it may concern:

Be it known that I, EDGAR XV. CLEVELAND, a citizen of the United States of America, and a resident of Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Multiple-Spindle DrillingMa chines, of which the following is a full, clear,

- and exact description.

This invention relates to improvements in multiple-s indle drilling-machinesthat is, machines aving series of drill or other tool carrying spindles which are circularly arranged and all rotatably driven from a common shaft and which are individually and severally radially adjustable relatively to the axis of the common shaft for drilling holes as variously required quite near to or quitefar from the center of a given piece of WOIkflhd. the invention es ecially pertains to the driv ing means for al the series of drill-spindles, whereby such spindles may be all simultaneously rotated in the forward direction and then all simultaneously rotated in the reverse direction, to the end that in the use of screw-threading tools or taps carried by the spindles after already drilled holes have been tapped the reversed rotations of all the spindles will cause the taps to screw themselves out from the holes previously threaded, thereby without stripping or otherwise injuring the threads.

The invention consists in a drilling-machine, in the combination with a drillspindledriving shaft having a b'evel gear-wheel provided with a clutch member aifixed thereon, of a spur gear-wheel having a tubular hub loosely surrounding said driving-shaft, a series of spur gear-wheels or pinions in circular arrangement surrounding and in mesh with said spur gear-wheel, and a series of drill or tool spindles having connections with and to be driven by said pinions, another bevel gear-wheel having a clutch member opposite said first-named bevelgear and loose on said spur-gear-wheel hub, an idler bevel gearwheel axially right angular to and in constant mesh with both said opposed bevel gear-wheels, a clutch-sleeve axially slidable along but non-rotative relatively to said spur gear-wheel hub and adapted to be free from both said bevel-gear clutch members and to be in engagement with either one or the other of such clutch members, and means for positioning the clutch-collar.

I The improvements are illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of a radial multiple-spindle drilling-machine and showing the external aspect of the casing forming part of a spindle-carrying headin which important constituents of this invention are contained. Fig. 2 is a central vertical sectional view, on a larger scale, through the reversing-gearing for the drill-spindle-driving means. Fig. 3 is a horizontal sectional view as taken on the line 3 3, Fig. 2.

Similar characters of reference indicate corresponding parts in all of the views.

In the drawings, A represents the head, which carries a circular series of drill-spindles a, said head being movable upwardly and downwardly on ways I; of the standard B, the feed mechanism for the head A being omitted from the illustrations, as the same involves no novelty and is to be the ordinary description of mechanism-in common and extensive use.

C represents that which, so far as the present improved mechanism is concerned, may be considered the driving-shaft therefor, the same being rotated by the belt-driven shaft D through the bevel-gears (i, said shaft, as as common, having a spline connection with the gear-wheel surrounding it, and is bodily axially movable. Keyed or otherwise afi'ixed on a portion of the driving-shaft C, which is within the casing F, is a bevel gear-wheel G, hav'ng at the iimer end of its hub aclutch member A s ur gear-wheel H, having a comparatively ong tubular hub H surrounds said driving-shaft below the bevel gear-wheel G.

A series of spur gear wheels or pinions J J in circular arrangement surround and are in mesh with said spur gear-wheel H, these pinions J J being formed on or attached to vertical shafts J which have by universally jointed and telesco ic shaft-sections y' driving connections with the drill or tool spindles (1, these driving connections being of a character very common in the type of drillingmachine to which this invention relates.

L represents another bevel-gear similar to the one G, but mounted separated from and in opposition thereto, the same being fitted for a rotation loosely about the hub H of the spur gear-wheel'H, and this bevel gear-wheel has at an inner end of its hub or inner face a clutch member g.

M represents an idler bevel gear-wheel axially right angular to and in constant mesh with both said opposed bevel gear-wheels G and L, the same being mounted for rotation on a short shaft or stud i, supported bythe casing J.

represents a clutch-sleeve axially slidable along, but non-rotative relatively to the hub H of the spur gear-wheel H, this capability for endwise movement with no possibility of turning relatively to the sleeve being established by the spline or feather 7c of the one part engaging in a longitudinal groove 'm in the other. The said clutch-sleeve has at opposite ends suitable clutch members and g for en agement in the clutch members f and g of the opposed bevel gear-wheels G and L, the length of the clutch-sleeve being less than the distance between the clutch me1nbers of the said bevel gear-wheels, so that the sleeve may either be out of clutch with both bevelgear clutch members or it may be in engagement with either one or the other thereof-according to the positioning of the sleeve, which is accomplished by the yoke ended lever P, the studs 0 of which engage in the annular groove of the clutch-sleeve, said lever having a detent 8, comprising a stud t, to engage in either of three sockets u in the face of the bracket 1), on which at w the sleeve-operating lever is pivoted.

.If the clutch-sleeve is moved by the lever upward, engaging into the clutch member of bevel gear-wheel G, the hub of the spur gearwheel H will by the clutch-sleeve be united to the shaft C and will run in the forw ard direction in unison with such shaft, but if the clutch-sleeve is thrown downwardly and into clutch with the other bevel gear-wheel L, which always runs in the opposite direction, the spur gear-wheel H will be made to rotate i'i-Tr" in unison with the reversely-running bevel gear-wheel L, and will rotate the screw-cutting taps carried by the drill-spindles in the reverse direction to run them out of the holes in any given iece of work in which they had just previous y performed the thread-forming operation.

The form or species of clutch members on the opposed bevel gear-wheels and on the opposite ends of the clutch-sleeve is immaterial, that shown in the mechanism designed-as illustrated comprising intermeshing teeth.

I claim Ina drilling --machine, the combination with a drill-spindle-driving shaft, having -a gear-wheel provided with a clutch member, affixed thereon, of a spur gear-wheel having a tubular hub loosely surrounding said driving-shaft, a series of spur gear wheels or pinions, in circular arrangement surrounding, and in mesh with, said spur gear wheel, and a series of tool-spindles having connections with, and to be driven by, said pinions, another gear-wheel, having a clutchmeinber, opposite said first-named gear-wheel, and loose on said spur gear-wheel hub,.'an.idler gear-wheel in constant mesh with both said opposed gear-wheels, a clutch-sleeve. axially slidable along, but non-rotative relatively to, said spur gear-wheel hub, and; adapted to. be free from both said gear-wheel clutchmembers, and to be in engagement with either one or the other of such clutch members, and means for positioning the clutch-sleeve.

Signed by me at Springfield, Massachusetts, in presence of two subscribing witnesses.

EDGAR W. CLEVELAND. Witnesses WM. S. BELLOWS, G.R.DR1scoLL. 

